Department of Animal Science, Laiyang Agricultural College (265200) Professor Su Zhenhan's fur freeness and quality are directly related to the future of the rabbit breeding industry. Different breeds, Rex rabbit fur quality is not the same; the same species, different breeding methods raised Rex rabbits are also larger.
The quality of an excellent rex rabbit is summed up in eight words: body, weight, short, flat, dense, fine, beautiful, and prison. The first two words refer to the physical appearance of the good forgiveness. The head is wide, the mouth is wide, the neck is short, the chest is wide, the hip is wide, the limbs are strong, and the color is pure. Large body weight, male and female rabbits weigh 4.0 to 4.5 kg. The last six words are the coats of the good rex rabbits, and the hairs are not lodging. The best length is 1.6 cm. Coats are flat, coarse hairs and down hairs tend to be uniform, and coarse hairs do not protrude from the hair surface. The coat is dense and rich in hand, with an average of 1 square centimeter and six months old rabbits with hair density not less than 18,000. The fineness of the rabbit hair is 16-18 micrometers, and the hand feels like silk. No hair loss, tough quality. Only fine rabbits can produce high-grade rex rabbits. The difference between the quality of high-grade rex rabbit skin and ordinary rex rabbit skin is mainly reflected in the following aspects: (1) the density of hair. The average density of ordinary rabbit skin is only 9,000-12,000/cm2, while that of high-grade rex rabbit skin is more than 18000/cm2, and (2) the gross hair rate. Ordinary Rex rabbits have a high rate of hirsutism and Rex rabbits have a low quality. At present, the high-grade Rex rabbit skin tends to develop without coarse hair. For example, at the sixth age of the Rex Rabbit, the coarse hair rate was only 2.6%. (3) The fineness of the length of the hair. Ordinary rabbits show coarse villi having a larger length difference, coarse hairs that are shorter, and do not protrude from the hair surface. The entire hair surface is smooth and tidy, cool and silky, soft to the touch, and beautiful in appearance. (4) Skinfold amplitude. Skin size, ordinary Rex rabbit skin is generally less than 0.09 square meters, while the high-grade Rex rabbit skin flap requirements of 0.1111 square meters or more; the lack of fur quality will reduce the level of skin even better. Practice has proved that only when the live rabbit weighs more than 2.85 kg, the rabbit skin area can reach more than 0.1111 square meters. If you want to make the rabbit into the ranks of a good rabbit, you must seize the following links.
First, choose the species.
To strictly select seeds, rabbits that do not meet the requirements of the species must not be used for breeding. Because the quality of the rabbit coat, such as hair density, fineness, length and so on are related to genetic factors. When selecting rabbits to breed rabbits, female rabbits should reach 4 kg or more and male rabbits should reach 3.8 kg or more. In addition, the Rex Rabbit is a multi-naked animal that breeds all year round. Early mating and over-breeding will make it difficult for excellent Rex rabbits to exert their productive effects, resulting in premature aging of male and female rabbits. Over-breeding females have poor physique and cannot pass good traits to the next generation, and breeds soon degenerate. To maintain the excellent quality of Rex rabbits, how can we arrange it for a year? In general, the male traits of the male rabbit should be better than female rabbits after being selected for breeding. For the American offspring, it is best to adopt the method of progressive hybridization: that is, using pure breeder rabbits as the parent to improve the hybrid rabbits in the field, and then strictly eliminate the offspring that are produced. In the ideal offspring, cross-fixation, the use of this hybrid method, can quickly change the quality of the rabbit group, can produce high-quality high-grade rex rabbit skin.
Rex rabbit selection methods: (1) nest selection: is to choose litter and more litter size, in general there are up to eight litter size, the production of pups developed evenly. (2) Weaning and selecting: It is to select a large body at weaning, and the whole litter of puppies develops evenly and is healthy and lively. When weaning at 32 days of age, the average weight of pups should reach 700 grams. (3) 3 months old seed selection: mainly to see the growth and development, health status, choose healthy rabbits with fast growth and no disease. All chronic diseases such as coccidiosis and pasteurosis are eliminated. The 3-month-old body weight should reach 2200 grams or more. (4) Selection before slaughter; mainly depends on the quality of the coat, plush quality, body size, body weight 5.5 months old should reach 3000 grams or more. (5) Seed selection after mating: mainly depends on breeding ability, conception rate, number of litters, number of pups survived, pups weaned weight and survival rate after weaning. If male rabbits have poor semen quality, female rabbits do not perform well in two consecutive litters, and they must be eliminated. (Next period)
The quality of an excellent rex rabbit is summed up in eight words: body, weight, short, flat, dense, fine, beautiful, and prison. The first two words refer to the physical appearance of the good forgiveness. The head is wide, the mouth is wide, the neck is short, the chest is wide, the hip is wide, the limbs are strong, and the color is pure. Large body weight, male and female rabbits weigh 4.0 to 4.5 kg. The last six words are the coats of the good rex rabbits, and the hairs are not lodging. The best length is 1.6 cm. Coats are flat, coarse hairs and down hairs tend to be uniform, and coarse hairs do not protrude from the hair surface. The coat is dense and rich in hand, with an average of 1 square centimeter and six months old rabbits with hair density not less than 18,000. The fineness of the rabbit hair is 16-18 micrometers, and the hand feels like silk. No hair loss, tough quality. Only fine rabbits can produce high-grade rex rabbits. The difference between the quality of high-grade rex rabbit skin and ordinary rex rabbit skin is mainly reflected in the following aspects: (1) the density of hair. The average density of ordinary rabbit skin is only 9,000-12,000/cm2, while that of high-grade rex rabbit skin is more than 18000/cm2, and (2) the gross hair rate. Ordinary Rex rabbits have a high rate of hirsutism and Rex rabbits have a low quality. At present, the high-grade Rex rabbit skin tends to develop without coarse hair. For example, at the sixth age of the Rex Rabbit, the coarse hair rate was only 2.6%. (3) The fineness of the length of the hair. Ordinary rabbits show coarse villi having a larger length difference, coarse hairs that are shorter, and do not protrude from the hair surface. The entire hair surface is smooth and tidy, cool and silky, soft to the touch, and beautiful in appearance. (4) Skinfold amplitude. Skin size, ordinary Rex rabbit skin is generally less than 0.09 square meters, while the high-grade Rex rabbit skin flap requirements of 0.1111 square meters or more; the lack of fur quality will reduce the level of skin even better. Practice has proved that only when the live rabbit weighs more than 2.85 kg, the rabbit skin area can reach more than 0.1111 square meters. If you want to make the rabbit into the ranks of a good rabbit, you must seize the following links.
First, choose the species.
To strictly select seeds, rabbits that do not meet the requirements of the species must not be used for breeding. Because the quality of the rabbit coat, such as hair density, fineness, length and so on are related to genetic factors. When selecting rabbits to breed rabbits, female rabbits should reach 4 kg or more and male rabbits should reach 3.8 kg or more. In addition, the Rex Rabbit is a multi-naked animal that breeds all year round. Early mating and over-breeding will make it difficult for excellent Rex rabbits to exert their productive effects, resulting in premature aging of male and female rabbits. Over-breeding females have poor physique and cannot pass good traits to the next generation, and breeds soon degenerate. To maintain the excellent quality of Rex rabbits, how can we arrange it for a year? In general, the male traits of the male rabbit should be better than female rabbits after being selected for breeding. For the American offspring, it is best to adopt the method of progressive hybridization: that is, using pure breeder rabbits as the parent to improve the hybrid rabbits in the field, and then strictly eliminate the offspring that are produced. In the ideal offspring, cross-fixation, the use of this hybrid method, can quickly change the quality of the rabbit group, can produce high-quality high-grade rex rabbit skin.
Rex rabbit selection methods: (1) nest selection: is to choose litter and more litter size, in general there are up to eight litter size, the production of pups developed evenly. (2) Weaning and selecting: It is to select a large body at weaning, and the whole litter of puppies develops evenly and is healthy and lively. When weaning at 32 days of age, the average weight of pups should reach 700 grams. (3) 3 months old seed selection: mainly to see the growth and development, health status, choose healthy rabbits with fast growth and no disease. All chronic diseases such as coccidiosis and pasteurosis are eliminated. The 3-month-old body weight should reach 2200 grams or more. (4) Selection before slaughter; mainly depends on the quality of the coat, plush quality, body size, body weight 5.5 months old should reach 3000 grams or more. (5) Seed selection after mating: mainly depends on breeding ability, conception rate, number of litters, number of pups survived, pups weaned weight and survival rate after weaning. If male rabbits have poor semen quality, female rabbits do not perform well in two consecutive litters, and they must be eliminated. (Next period)
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